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US 8,986,160 B2Granted
Epicyclic gear system
AssigneeAVIO S.p.A.
InventorsPaolo Altamura, Edoardo Curti, Giovanni Oddone, Michele Gravina, Giulio Zagato
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Abstract
In an epicyclic gear system, each planet gear is connected by a respective connecting pin to an asymmetric planet carrier having two plate portions connected to each other, and only one of which is connectable to a reaction member; and at least one end portion of each connecting pin and the plate portion connected to the reaction member are connected by a radially undulated annular wall flexible angularly and radially.
Claims15
An epicyclic gear system comprising a sun gear;
- a ring gear;
- a number of planet gears meshing with the sun gear and ring gear;
- a planet carrier;
- and
- a connecting pin connecting each planet gear to the planet carrier;
- the planet carrier comprising a first and second plate portion on opposite sides of said planet gears, said first plate portion connected to a stationary or rotary member, and said first and second plate portions connected to each other;
- flexible coupling means being interposed between at least one of said first and second plate portion and each said connecting pin;
- and
- the gear system being characterized in that said flexible coupling means comprise at least one elastically flexible portion, which is elastically flexible angularly and radially, and is curved in radial section to define at least one annular recess coaxial with said connecting pin;
- wherein the elastically flexible portion and the respective plate portion form part of a one-piece body.
7 more elements
An epicyclic gear system comprising a sun gear;
- a ring gear;
- a number of planet gears meshing with the sun gear and ring gear;
- a planet carrier;
- and
- a connecting pin connecting each planet gear to the planet carrier;
- the planet carrier comprising a first and second plate portion on opposite sides of said planet gears, said first plate portion connected to a stationary or rotary member, and said first and second plate portions connected to each other;
- flexible coupling means being interposed between at least one of said first and second plate portion and each said connecting pin;
- and
- the gear system being characterized in that said flexible coupling means comprise at least one elastically flexible portion, which is elastically flexible angularly and radially, and is curved in radial section to define at least one annular recess coaxial with said connecting pin;
- wherein the elastically flexible curved portion forms part of a radially undulated annular wall surrounding the connecting pin, the undulated annular wall defining the annular recess;
- and
- wherein the undulated annular wall at least partly defines two equioriented further annular recesses coaxial with the connecting pin, the further annular recesses being located inwards and outwards of the annular recess respectively.
9 more elements
Dependencies are inferred from the claim text.